منابع مشابه
Lifetime reproductive effort.
In a 1966 American Naturalist article, G. C. Williams initiated the study of reproductive effort (RE) with the prediction that longer-lived organisms ought to expend less in reproduction per unit of time. We can multiply RE, often measured in fractions of adult body mass committed to reproduction per unit time, by the average adult life span to get lifetime reproductive effort (LRE). Williams's...
متن کاملLifetime reproductive effort in humans.
Lifetime reproductive effort (LRE) measures the total amount of metabolized energy diverted to reproduction during the lifespan. LRE captures key components of the life history and is particularly useful for describing and comparing the life histories of different organisms. Given a simple energetic production constraint, LRE is predicted to be similar in value for very different life histories...
متن کاملEnergetics and reproductive effort.
Natural selection favors the optimal allocation of energy and other limiting resources to reproduction. Human reproductive physiology displays characteristic patterns that can be viewed as mechanisms that help optimize reproductive effort in the face of environmental energetic constraints. Female ovarian function is particularly sensitive to energy balance and energy flux, resulting in a synchr...
متن کاملTemperature, latitude and reproductive effort
The traditional IBP formulation of the energy budget is unsuitable for many marine organisms, partly because it sets production and respiration as alternative sinks when in reallty they are linked but also because it fails to recognise the heterogeneous nature of respiratory demand. The vanous components of total respiration reflect separate demands for ATP which are hkely to differ in their re...
متن کاملReproductive effort in viscous populations.
Here I study a kin selection model of reproductive effort, the allocation of resources to fecundity versus survival, in a patch-structured population. Breeding females remain in the same patch for life. Offspring have costly, partial long-distance dispersal and compete for breeding sites, which become vacant upon the death of previous occupants. The main result is that the evolutionarily stable...
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ژورنال
عنوان ژورنال: The American Naturalist
سال: 2007
ISSN: 0003-0147,1537-5323
DOI: 10.1086/522840